Main Features:

【Hybrid Active Noise Cancelling 】 Famous MAX ANC chip, combined with Hybrid ANC (FB+FF ANC mode, 4mics) mode, which ensure a 28-30dB Active Noise Cancelling depth.

【Superior Sound Quality】 Industry original 40mm stereo Bio-composite drivers combined with an advanced Bluetooth Qualcomm chipset, provides amazing sound performance, more plentiful and dynamic base, delicate and clean details performance, wider frequency allows more balanced response.

【Independent Earcups】Drivers are independently equipped in isolated earcups and separated from battery and other electronic components, which eliminates electromagnetic interference and performance wonderful.

【30 Hours Longer Playtime】High quality 500mAh battery, stream music for up to 30 hours per charge; connect the included audio cable for stable wired audio playback.

【Protein Pad & Custom Fit】 Adjustable & foldable headband and super soft protein ear pads, fully customizable fit with swiveling ear cups ensure you a comfortable wearing. Your ideal music companion for traveling.

【Clear Call Quality】Built in CVC8.0 noise cancelling microphone provides clear hands-free calls, which is convenient for you to free yourself from wires talking like face to face. 

【Ambient Voice Mode】 When you need talking with someone, don't need to take off the headphone but just activate Ambient Voice mode.

【Purchase Link】https://www.alibaba.com/product-detail/Teeline-M29-Wireless-Noise-Cancelling-Headset_1601231175949.html?spm=a2700.shop_plgr.41413.26.a1e871214iJEgw